Cut any gear with just a slitting saw

This video taught me two things: first that I really like the gear math and this method of approximating a complex shape. Second, that gear cutters are so so cheap in comparison to making 200 cuts per gear

I am a retired master machinist. I worked many years in shops that made gears for textiles as well as printing equipment. I was curious when I saw this video about how you were going to create the involute profile of the gear tooth but was pleasantly surprised at how you did it. Very impressive.

Charleston Naval Shipyard had a precision gear machine that was programmed by 4 gears in the machine. 4 equations had to be satisfied to pick the 4 programming gears. I wrote a BASIC program to test every possible combination to solve the problems. I only had a Radio Shack Model 3 to run the program. It took 2 weeks to complete. 24/7. Each time it came up with a solution, it stored the data on its floppy disk and printed it out on one line of the printer. After completion, the results were sorted and printed out to create 7 volumes to use on the machine. Tests showed my effort gave results making custom gears much easier with no math. That was in 1975.

I will not even get NEAR to do ANY of this ever in my life, yet I watched the entire video. Awesome work, and what a beauty of a perfect gear you have made! ⚙️👍

As a job shop machinist of 20 some years and a industrial maintenance mechanic who was the go to machinist at that plant for nearly 17 years I was quite impressed with this video. This is the type of project you might be given in a school shop for the student(s) to learn machine practice and theory. Although not practical in the real world the experience the math the adaptation of machine tools and the hands on machining would be priceless. Let me add you could have save yourself a few radius corner cuts by using an endmill with rounded corners. They can be shaped quite easily by hand to the end mill using a grinding wheel. One cut centered and done.

As an engineer, I appreciate the derivations. It’s useful to see how you think through these calculations.

I'm a gear making machinist almost 45 years it's amazing

I was a gear manufacturer and designer many years ago. I was impressed with your gear knowledge and lovely to see your ingenuity in action. I don't think the quality would come anywhere near to that of a gear produced by specialist machines such as hobbers, planers and shapers and if you compare your time spent with subcontracting to a specialist I would sub out. However, that would take the fun and job satisfaction away. Enjoyed the video and the nostalgic trip.

Impressive, informative and entertaining. I wish every lesson in school was like this. Cheers and thanks for your work and time Andy,, 🍻😎👍‍‍!

It was at 5:56 that I decided if I ever need to make a gear I'll just go buy a cutter lol. You're a better n more patient man than me sir

I get paid to hob, shape, and single-pass gears. I'm impressed far beyond my initial expectations for this video. Definitely subscribed!

Great photography, the best I’ve ever seen

Well, after 50 years in machine shop engineering - and I operate my own jobbing shop with gear cutting capabilities - I must say how much I enjoyed your video! Very well presented and educational!

My brain lit up when you showed that a slitting saw is the same as a hob edge. It makes so much sense now! And thank you for all the hard work in video editing and screen graphics.

Also this is the only time any of the math taught in school has ever been useful for me. If this had been taught in my classroom, I would have been much eager to learn.

What an excellent video!! Not only that the content is interesting and most useful, but the presentation is very professional. All aspects - camera, lighting, sound, graphics (!) and especially the editing! The narration stands apart from all the others - as informative as it needs to be without dragging it out. Not off-the-cuff as most are, but scripted and as well spoken as a professional actor. The amount of time that went into this must be staggering. Thank you!

Whoa whoa whoa, a slitting blade, milling machine, and indexing head I can handle, but you didn't mention a Sharpie up front. You think we're all made of money or inherited fancy Sharpie markers?

Every once in a while there's a video with valuable educational knowledge. You gotta love the value available using trigonometry to better use and understand the trades. Electrician here. Well done video sir.

I'm very disappointed on how few views this has. This was a brilliant video. The graphics, animation and effort put into this was a lot of work. I appreciate it wholly!